The Sigpro is different than the other P-series guns in it's takedown procedure. Both the P-series and Sigpro require you to lock the slide back before disassembly. That way, you can eject a round if it's in the pipe and/or be more likely to look to see if a round is still in there.
The best way I've found to disassemble the Sigpro is to drop the mag, lock the slide back, check the chamber. Then, right hand index finger goes in the ejection port, right hand thumb supports behind in "web" area of grip. Left hand on slide. Pull with right index finger and unlock slide and use left hand to help add pressure against the slide releasing. When the slide is in proper orientation, pop out the slide lock with left hand index or middle finger. To reassemble, put slide back on frame and push it back until it stops. Then, insert slide lock into hole. Using same grip as before with take down, pull slide back and when in proper slide orientation, pop the slide lock in with left hand thumb. I found with this method I can field strip it really fast.
The Sigpro disassembly is slightly more of a pain than the P-series but is similar to Hipowers, 1911's, Slick & Willies, CZ's in that the slide stop comes out. People probably think I'm paranoid, but I always lock the slide back and check the chamber visually any time I handle a gun. Even if I set it down and go in the next room and I'm the only one at home, I recheck it; besides, it's fun to rack.
The best way I've found to disassemble the Sigpro is to drop the mag, lock the slide back, check the chamber. Then, right hand index finger goes in the ejection port, right hand thumb supports behind in "web" area of grip. Left hand on slide. Pull with right index finger and unlock slide and use left hand to help add pressure against the slide releasing. When the slide is in proper orientation, pop out the slide lock with left hand index or middle finger. To reassemble, put slide back on frame and push it back until it stops. Then, insert slide lock into hole. Using same grip as before with take down, pull slide back and when in proper slide orientation, pop the slide lock in with left hand thumb. I found with this method I can field strip it really fast.
The Sigpro disassembly is slightly more of a pain than the P-series but is similar to Hipowers, 1911's, Slick & Willies, CZ's in that the slide stop comes out. People probably think I'm paranoid, but I always lock the slide back and check the chamber visually any time I handle a gun. Even if I set it down and go in the next room and I'm the only one at home, I recheck it; besides, it's fun to rack.